rarely observed species in Belgium, but probably overlooked.
larva mines the lower stems of different grasses like Alopecurus, Bromus, Dactylis glomerata and Poa.
It frequently changes stems. It pupates in a white cocoon spun in
a folded leaf or leaf-sheath or on a stem of the food plant or other
adults fly in one generation a year from mid June towards September.
They can be seen flying during early afternoon sunshine. They
occasionally come to
Liège, Haccourt, 26 June 2010.
(Photo © Jean Marc Michalowski)